Device for monitoring durability of marine steel pipe pile

Abstract

The utility model relates to an ocean steel pipe pile durability monitoring device which comprises a monitoring assembly and a fixing assembly used for fixing the monitoring assembly to a steel pipe pile. The monitoring assembly comprises a first shell, a sensor assembly is arranged on the first shell, and the sensor assembly comprises at least two of a CL concentration sensor, a pH value sensor, a resistivity sensor and a corrosion sensor; a signal processing module, a control module and a communication module are arranged in the first shell, wherein the signal processing module is electrically connected with the sensor assembly and used for receiving monitoring signals output by all sensors included in the sensor assembly and outputting monitoring data, the control module is electrically connected with the signal processing module, and the communication module is electrically connected with the control module and used for sending the monitoring data. And the battery module is electrically connected with the signal processing module, the control module and the communication module. According to the utility model, the CFS system can be helped to collect more comprehensive data related to corrosion of the steel pipe, and the monitoring effect of the system is improved.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power plant equipment technology, and in particular to a durability monitoring device for marine steel pipe piles. Background Technology

[0002] In nuclear power plants, the Circulating Water Monitoring and Pre-filtration System (CFS system) employs a steel-concrete composite structure. An external ring-shaped steel pipe pile bears the load, while the internal structure is reinforced concrete. However, the steel pipe pile is susceptible to damage from marine mud and seawater environment, as well as seawater splash erosion, requiring high safety and durability standards. While some nuclear power plants use the CFS system to monitor the condition of the steel pipe pile for early warning and diagnosis, current CFS systems primarily monitor the corrosion rate of the steel pipe. Although this can reflect the corrosion status of the steel pipe pile to some extent in real time, it lacks monitoring of seawater pH, Cl concentration, and resistivity, resulting in unsatisfactory monitoring results. Currently, nuclear power plants urgently need a solution capable of comprehensively monitoring the degree of seawater corrosion. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a durability monitoring device for marine steel pipe piles.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a marine steel pipe pile durability monitoring device, including a monitoring component and a fixing component for fixing the monitoring component on the steel pipe pile;

[0005] The monitoring component includes a first housing, on which a sensor assembly is provided. The sensor assembly includes at least two of a Cl concentration sensor, an acid-base sensor, a resistivity sensor, and a corrosion sensor.

[0006] The first housing contains a signal processing module electrically connected to the sensor assembly for receiving monitoring signals output by each sensor in the sensor assembly and outputting monitoring data, a control module electrically connected to the signal processing module, a communication module electrically connected to the control module for sending monitoring data, and a battery module electrically connected to the signal processing module, the control module, and the communication module.

[0007] Preferably, the first housing includes a cover and a base for assembly with the cover;

[0008] The enclosure is used to house the signal processing module, control module, communication module, and battery module.

[0009] The top wall of the cover is provided with a receiving groove, and the sensor assembly is embedded in the receiving groove;

[0010] The base is mechanically connected to the fixing component.

[0011] Preferably, the communication module includes a wired communication module electrically connected to the signal processing module for sending the monitoring data to the data acquisition terminal;

[0012] The side wall of the cover is provided with a through hole, and a waterproof connector is provided on the through hole. The wired communication module is electrically connected to the data acquisition terminal through a cable passing through the waterproof connector.

[0013] Preferably, the communication module further includes a wireless communication module electrically connected to the signal processing module for sending the monitoring data to the mobile terminal.

[0014] Preferably, the fixing component includes a clamp and a fixing bracket disposed on the clamp, and the base is screwed onto the fixing bracket.

[0015] Preferably, the sensor assembly includes a second housing, and the outer wall of the second housing is provided with a plurality of first accommodating positions for assembling the CL concentration sensor, pH sensor or resistivity sensor and for exposing the sensor to the outside.

[0016] Preferably, the corrosion sensor includes a corrosion probe and a raw probe. The outer wall of the second housing is further provided with a second accommodating position for assembling the corrosion probe and making the corrosion probe contact the outside, and a third accommodating position for assembling the raw probe. The third accommodating position is further provided with an isolation member for isolating the raw probe from the outside.

[0017] Preferably, the signal processing module includes a resistivity signal processing unit electrically connected to the resistivity sensor and the control module, a corrosion signal processing unit electrically connected to the corrosion sensor and the control module, and an electrode signal processing unit electrically connected to the CL concentration sensor, the pH sensor, and the control module.

[0018] Preferably, the resistivity signal processing unit includes a voltage processing unit and a current processing unit;

[0019] The voltage processing unit includes a first instrumentation amplifier U306, a first resistor R315, a second resistor R321, a fourth resistor R318, and a first capacitor C321. The negative input terminal of the first instrumentation amplifier U306 is electrically connected to the negative terminal of the resistivity sensor and is electrically connected to digital ground via the first resistor R315. The positive input terminal of the first instrumentation amplifier U306 is electrically connected to the positive terminal of the resistivity sensor and is electrically connected to digital ground via the second resistor R321. The output terminal of the first instrumentation amplifier U306 is electrically connected to digital ground via the fourth resistor R318 and the first capacitor C321. The connection node between the fourth resistor R318 and the first capacitor C321 is electrically connected to the control module.

[0020] The current processing unit includes a second instrumentation amplifier U307, a fifth resistor R324, a sixth resistor R326, an eighth resistor R325, and a second capacitor C326. The negative input terminal of the second instrumentation amplifier U307 is electrically connected to digital ground via the fifth resistor R324. The positive input terminal of the second instrumentation amplifier U307 is electrically connected to the negative terminal of the resistivity sensor and is also electrically connected to digital ground via the sixth resistor R326. The output terminal of the second instrumentation amplifier U307 is electrically connected to digital ground via the eighth resistor R325 and the second capacitor C326. The connection node between the eighth resistor R325 and the second capacitor C326 is electrically connected to the control module.

[0021] Preferably, the corrosion signal processing unit includes a third instrumentation amplifier U105, a ninth resistor R119, a tenth resistor R122, an eleventh resistor R120, a thirteenth resistor R121, a third capacitor C129, a fourth capacitor C130, a fifth capacitor C132, and a sixth capacitor C131.

[0022] The negative input terminal of the third instrumentation amplifier U105 is connected to the negative terminal of the corrosion sensor via the ninth resistor R119 and to digital ground via the third capacitor C129. The positive input terminal of the third instrumentation amplifier U105 is connected to the positive terminal of the corrosion sensor via the tenth resistor R122 and to digital ground via the fifth capacitor C132. The negative and positive input terminals of the third instrumentation amplifier U105 are also connected to the fourth capacitor C130. The eleventh resistor R120 is connected to the negative and positive terminals of the corrosion sensor. The output terminal of the third instrumentation amplifier U105 is connected to digital ground via the thirteenth resistor R121 and the sixth capacitor C131. The connection point of the thirteenth resistor R121 and the sixth capacitor C131 is electrically connected to the control module.

[0023] The technical solution of this utility model involves fixing the monitoring component to the steel pipe pile using a fixing component, and collecting monitoring data (including at least two of the following: seawater pH, seawater CL concentration, seawater resistivity, and corrosion rate) through the sensor component. The monitoring data is then sent to the CFS system through the communication module, which helps the CFS system collect more comprehensive data related to the corrosion of the steel pipe, thereby improving the monitoring effect of the system. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the marine steel pipe pile durability monitoring device in some embodiments of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the monitoring component in some embodiments of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the first housing in some embodiments of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the fixing component in some embodiments of this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the fixing frame in some embodiments of this utility model;

[0030] Figure 6 This is a schematic diagram of the connecting ear structure in some embodiments of this utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the outer side wall of the second shell in some embodiments of this utility model;

[0032] Figure 8 This is a circuit structure block diagram of each circuit module in the first housing in some embodiments of this utility model;

[0033] Figure 9 This is a schematic diagram of the structure of each circuit module in the first housing in some embodiments of this utility model;

[0034] Figure 10 This is a circuit structure block diagram of the signal processing module in some embodiments of this utility model;

[0035] Figure 11 This is a circuit diagram of the resistivity signal processing unit in some embodiments of this utility model;

[0036] Figure 12 This is a circuit diagram of the corrosion signal processing unit in some embodiments of this utility model;

[0037] Figure 13 This is a circuit diagram of each isolation unit in some embodiments of this utility model;

[0038] Figure 14 This is a circuit diagram of the signal switching unit in some embodiments of this utility model;

[0039] Figure 15 This is a schematic diagram of the structure of the waterproof connector in some embodiments of this utility model. Detailed Implementation

[0040] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0041] In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "up," "down," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] This invention provides a durability monitoring device for marine steel pipe piles. This device is used to assist the circulating water monitoring and pre-filtration system (CFS system) in nuclear power plants in collecting data related to the durability of steel pipe piles. This data may include parameters such as seawater CL concentration (i.e., chloride ion concentration in seawater, which is one of the parameters reflecting the corrosion intensity of seawater on steel pipe piles), seawater pH (i.e., pH value of seawater, which is one of the parameters reflecting the corrosion intensity of seawater on steel pipe piles), seawater resistivity (i.e., electrical conductivity of seawater, which is one of the parameters reflecting the corrosion intensity of seawater on steel pipe piles), corrosion rate (which can indicate the radiation level of steel pipe piles), and polarization potential (which can reflect the corrosion inhibition effect of polarization treatment on steel pipe piles).

[0043] like Figure 1 As shown, the marine steel pipe pile durability monitoring device may include a monitoring component 1 and a fixing component 2 for fixing the monitoring component 1 to the steel pipe pile 100.

[0044] like Figure 2As shown, the monitoring component 1 may include a first housing 11, on which a sensor component 12 is disposed. The sensor component 12 includes at least two of a Cl concentration sensor, a pH sensor, a resistivity sensor, a polarization potential sensor, and a corrosion sensor. Understandably, each sensor included in the sensor component 12 is capable of sensing corresponding information and generating a monitoring signal (i.e., durability data) that can represent relevant information based on the sensed information.

[0045] In some embodiments, such as Figure 3 As shown, the first housing 11 includes a cover 111 and a base 112 for assembly with the cover 111, wherein the cover 111 and the base 112 can be assembled by screwing. The cover 111 is used to house the signal processing module 13, the control module 14, the communication module 15, and the battery module 16, thereby isolating the signal processing module 13, the control module 14, the communication module 15, and the battery module 16 from the outside environment, thus protecting them from seawater and air corrosion, and improving the reliability and service life of the device.

[0046] like Figure 2 As shown, the top wall of the cover 111 is provided with a receiving groove 1111. The sensor assembly 12 can be embedded in the receiving groove 1111 by screwing. After the sensor assembly 12 is installed, a waterproof material (such as potting epoxy resin) can be placed in the gap between the sensor assembly 12 and the receiving groove 1111 to avoid seawater and air intrusion.

[0047] like Figure 5 As shown, the base 112 is mechanically connected to the fixing component 2, so that the entire monitoring component 1 can be fixed on the steel pipe pile through the fixing component 2.

[0048] In some embodiments, such as Figure 4 and Figure 5 As shown, the fixing component 2 may include a clamp 21 and a fixing bracket 22 disposed on the clamp 21, with the base 112 bolted to the fixing bracket 22. The fixing bracket 22 may be a stainless steel support, the specific shape of which can be found in [reference needed]. Figure 5 No restrictions are imposed here.

[0049] In some embodiments, such as Figure 4 As shown, the clamp 21 includes multiple clamp connecting segments connected end to end. In this embodiment, the number of clamp connecting segments is 3. Figure 6 As shown, each section of the clamp connector is provided with a connecting ear 211 at its end. Each clamp connector can be locked onto the steel pipe pile by the bolts engaging with the connecting ear 211.

[0050] In some embodiments, such as Figure 2 and Figure 7As shown, the sensor assembly 12 includes a second housing 121. The outer wall of the second housing 121 is provided with multiple first receiving positions 311 for mounting a CL concentration sensor, a pH sensor, a resistivity sensor, or a polarization potential sensor, and for exposing the sensor to the outside environment. The first receiving positions 311 can be through holes, allowing the sensor installed therein to contact seawater to sense the corresponding information.

[0051] In some embodiments, the corrosion sensor may include a corrosion probe and a raw probe; further, please refer to... Figure 7 The outer wall of the second housing 121 is further provided with a second receiving position 312 for assembling a corrosion probe and allowing the corrosion probe to contact the outside environment, and a third receiving position 313 for assembling the original probe. The third receiving position 313 is also provided with an isolation component (not shown) for isolating the original probe from the outside environment. The second receiving position 312 can be an annular groove, allowing the corrosion probe to have a large contact area with seawater when assembled into the annular groove. The third receiving position 313 can be a receiving groove, and the isolation component can be epoxy resin encapsulated on the original probe to prevent the original probe from directly contacting seawater or air and accelerating corrosion. In this embodiment, the corrosion sensor is a conventional corrosion sensor, and its working principle can be referred to existing corrosion monitoring technologies, which will not be elaborated here.

[0052] like Figure 8 As shown, the first housing 11 houses a signal processing module 13, a control module 14, a communication module 15, and a battery module 16. The signal processing module 13, control module 14, and communication module 15 can be configured to... Figure 9 On the circuit board 345 shown.

[0053] like Figure 8 As shown, the signal processing module 13 is electrically connected to the sensor assembly 12 to receive monitoring signals output by each sensor included in the sensor assembly 12, and then outputs monitoring data based on these monitoring signals. Understandably, the monitoring data may include CL concentration (detected by a CL concentration sensor), pH (detected by a pH sensor), resistivity (detected by a resistivity sensor), polarization potential (detected by a polarization potential sensor), corrosion rate (detected by a corrosion sensor), and polarization potential (detected by a corrosion sensor).

[0054] In some embodiments, such as Figure 10 As shown, the signal processing module 13 may include a resistivity signal processing unit 41 electrically connected to the resistivity sensor and the control module 14, a corrosion signal processing unit 42 electrically connected to the corrosion sensor and the control module 14, and an electrode signal processing unit 43 electrically connected to the CL concentration sensor, the pH sensor, the polarization potential sensor and the control module 14.

[0055] In some embodiments, such as Figure 11 As shown, the resistivity signal processing unit 41ky includes a voltage processing unit 411 and a current processing unit 412.

[0056] like Figure 11 As shown, the voltage processing unit 411 may include a first instrumentation amplifier U306, a first resistor R315, a second resistor R321, a third resistor R312, a fourth resistor R318, and a first capacitor C321. The negative input terminal of the first instrumentation amplifier U306 is electrically connected to the negative terminal (DAC_out_N) of the resistivity sensor and is electrically connected to digital ground via the first resistor R315. The positive input terminal of the first instrumentation amplifier U306 is electrically connected to the positive terminal (DAC_out_P) of the resistivity sensor and is electrically connected to digital ground via the second resistor R321. The two gain terminals of the first instrumentation amplifier U306 are connected to the third resistor R312. The reference voltage terminal of the first instrumentation amplifier U306 is electrically connected to the set reference voltage. The output terminal of the first instrumentation amplifier U306 is electrically connected to digital ground via the fourth resistor R318 and the first capacitor C321. The connection point between the fourth resistor R318 and the first capacitor C321 is electrically connected to the control module 14. The first instrumentation amplifier U306 may be an XL620 instrumentation amplifier.

[0057] like Figure 11 As shown, the current processing unit 412 includes a second instrumentation amplifier U307, a fifth resistor R324, a sixth resistor R326, a seventh resistor R323, an eighth resistor R325, and a second capacitor C326. The negative input terminal of the second instrumentation amplifier U307 is electrically connected to digital ground via the fifth resistor R324. The positive input terminal of the second instrumentation amplifier U307 is electrically connected to the negative terminal (DAC_out_N) of the resistivity sensor and is also electrically connected to digital ground via the sixth resistor R326. The two gain terminals of the second instrumentation amplifier U307 are connected to the seventh resistor R323. The reference voltage terminal of the second instrumentation amplifier U307 is electrically connected to the set reference voltage. The output terminal of the second instrumentation amplifier U307 is electrically connected to digital ground via the eighth resistor R325 and the second capacitor C326. The connection node between the eighth resistor R325 and the second capacitor C326 is electrically connected to the control module 14. The second instrumentation amplifier U307 can be an XL620 instrumentation amplifier.

[0058] In some embodiments, such as Figure 12As shown, the corrosion signal processing unit 42 may include a third instrumentation amplifier U105, a ninth resistor R119, a tenth resistor R122, an eleventh resistor R120, a twelfth resistor R118, a thirteenth resistor R121, a third capacitor C129, a fourth capacitor C130, a fifth capacitor C132, and a sixth capacitor C131. The negative input terminal of the third instrumentation amplifier U105 is connected to the negative terminal (U_R_I N-) of the corrosion sensor via the ninth resistor R119, and to digital ground via the third capacitor C129. The positive input terminal of the third instrumentation amplifier U105 is connected to the positive terminal (U_R_I N+) of the corrosion sensor via the tenth resistor R122, and to digital ground via the fifth capacitor C132. The negative and positive input terminals of the third instrumentation amplifier U105 are also connected to the fourth capacitor C130. The eleventh resistor R120 is connected to the negative and positive terminals of the corrosion sensor. The two gain terminals of the third instrumentation amplifier U105 are connected to the twelfth resistor R118. The reference voltage terminal of the third instrumentation amplifier U105 is electrically connected to the setting reference voltage. The output terminal of the third instrumentation amplifier U105 is electrically connected to digital ground via the thirteenth resistor R121 and the sixth capacitor C131. The connection node between the thirteenth resistor R121 and the sixth capacitor C131 is electrically connected to the control module 14. Among them, the third instrumentation amplifier U105 can be an instrumentation amplifier with the model number XL620.

[0059] In some embodiments, the electrode signal processing unit 43 may include, for example, Figure 13 The three isolation units 431 shown, and as... Figure 14 The signal switching unit shown.

[0060] like Figure 13 As shown, each isolation unit 431 may include an optocoupler U212, a fourteenth resistor R219, and a fifteenth resistor R217. The light-emitting input terminal of the optocoupler U212 is electrically connected to the control module 14 via the fifteenth resistor R217, the light-emitting output terminal is electrically connected to digital ground, the light-receiving input terminal is electrically connected to the first DC voltage via the fourteenth resistor R219, and the light-receiving output terminal is electrically connected to analog ground. The optocoupler U212 may be an IS2801 type optocoupler.

[0061] like Figure 14 As shown, the signal switching unit may include a multiplexer U213. The three channel control terminals of the multiplexer U213 are electrically connected to the light-receiving input terminals of the three optocouplers U212, respectively. The output terminal of the signal switching unit is electrically connected to the control module 14, and the multiple input terminals of the signal switching unit are electrically connected to the CL concentration sensor, the pH sensor, and the polarization potential sensor, respectively. The multiplexer U213 may be a CD4051 multiplexer.

[0062] Since the number of ADC ports in the control module 14 is limited, and the detection signals output by the CL concentration sensor, pH sensor and polarization potential sensor are analog signals, in this embodiment, each isolation unit 431 can control the conduction relationship between the output terminal of the multiplexer U213 and its input terminals according to the control signals output by the control module 14 (including CD4051_A0, CD4051_A1 and CD4051_A2), thereby enabling the control module 14 to obtain the analog signals output by multiple sensors through a single ADC port, saving ADC port resources.

[0063] like Figure 8 As shown, the control module 14 is electrically connected to the signal processing module 13 to receive the monitoring data output by the signal processing module 13 and convert the monitoring data into digital signals. Since the monitoring data output by the signal processing module 13 is an analog signal, it is not suitable for long-distance transmission. The main function of the control module 14 is to convert the monitoring data into digital signals, and to perform operations such as compression on the converted digital monitoring data through existing algorithms (to simplify the data and improve the data transmission efficiency). Of course, the control module 14 can also be used to control the operation of the signal processing module 13, the communication module 15, and the battery module 16. In some embodiments, the control module 14 may include a processing circuit composed of an existing microprocessor, which can be used to implement analog-to-digital conversion and to establish a communication connection with the communication module 15. No specific limitations are made here.

[0064] like Figure 8 As shown, the communication module 15 is electrically connected to the control module 14 to receive the converted monitoring data output by the control module 14 and send the monitoring data to the CFS system.

[0065] To improve the signal-to-noise ratio of monitoring data transmitted to the CFS system, in some embodiments, the communication module 15 may include a wired communication module 61 electrically connected to the signal processing module 13 for sending monitoring data to the data acquisition terminal included in the CFS system. The wired communication module 61 can be an existing RS485 communication circuit, or other wired communication circuits. It should be noted that nuclear power plants have a large number of steel pipe piles, and each steel pipe pile requires at least one marine steel pipe pile durability monitoring device to monitor its performance. To better collect monitoring data, existing CFS systems typically configure a data acquisition terminal near areas where several steel pipe piles converge. This data acquisition terminal collects the monitoring data output by the marine steel pipe pile durability monitoring devices on these converged steel pipe piles, and finally, all collected data can be sent to the CFS system via network communication (i.e., a local area network).

[0066] To prevent the marine steel pipe pile durability monitoring device from being submerged by seawater, in some embodiments, such as Figure 15As shown, the side wall of the cover 111 has a through hole (not shown), and a waterproof connector 17 is provided on the through hole. The wired communication module 61 is electrically connected to the data acquisition terminal through a cable passing through the waterproof connector 17. The waterproof connector 17 can be an existing waterproof connector.

[0067] In some embodiments, the communication module 15 further includes a wireless communication module 62 electrically connected to the signal processing module 13 for sending monitoring data to a mobile terminal; wherein, the wireless communication module 62 can be an existing Bluetooth communication circuit or a wireless RoLa communication circuit. To ensure the accuracy of the steel pipe pile durability monitoring and the normal operation of the marine steel pipe pile durability monitoring device, nuclear power plants regularly arrange for personnel to conduct on-site maintenance of the marine steel pipe pile durability monitoring device. This embodiment allows personnel to communicate with the marine steel pipe pile durability monitoring device on-site via a mobile terminal (such as a mobile phone). This allows personnel to obtain the monitoring data output by the marine steel pipe pile durability monitoring device through the mobile terminal, and then, in conjunction with the actual condition of the steel pipe pile, assess whether the marine steel pipe pile durability monitoring device is functioning properly. For example, it determines whether the actual corrosion condition of the steel pipe pile matches the degree reflected by the data output by the marine steel pipe pile durability monitoring device. If they do not match, it can be determined that the marine steel pipe pile durability monitoring device is abnormal and should be replaced.

[0068] like Figure 8 As shown, the battery module 16 is electrically connected to the signal processing module 13, the control module 14, and the communication module 15 to supply power to the signal processing module 13, the control module 14, and the communication module 15.

[0069] In some embodiments, the battery module 16 may include a battery and a voltage conversion circuit. The voltage conversion circuit may be an existing switching power supply circuit or a linear voltage conversion circuit. The function of the voltage conversion circuit is to convert the DC voltage output by the battery into a stable DC voltage of various values, including 5V and 3.3V, that can power the signal processing module 13, the control module 14, and the communication module 15.

[0070] Understandably, this utility model can fix the monitoring component on the steel pipe pile through the fixing component, so as to collect monitoring data (including at least two of the following: seawater pH, seawater CL concentration, seawater resistivity, and corrosion rate) through the sensor component, and then send the monitoring data to the CFS system through the communication module, so as to help the CFS system collect more comprehensive data related to corrosion of steel pipes, thereby improving the monitoring effect of the system.

[0071] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A durability monitoring device for marine steel pipe piles, characterized in that, It includes a monitoring component (1) and a fixing component (2) for fixing the monitoring component (1) to the steel pipe pile; The monitoring component (1) includes a first housing (11), on which a sensor component (12) is provided. The sensor component (12) includes at least two of the following: a CL concentration sensor, an acid-base sensor, a resistivity sensor, and a corrosion sensor. The first housing (11) is provided with a signal processing module (13) electrically connected to the sensor assembly (12) for receiving monitoring signals output by each sensor included in the sensor assembly (12) and outputting monitoring data, a control module (14) electrically connected to the signal processing module (13), a communication module (15) electrically connected to the control module (14) for sending monitoring data, and a battery module (16) electrically connected to the signal processing module (13), the control module (14) and the communication module (15).

2. The durability monitoring device for marine steel pipe piles according to claim 1, characterized in that, The first housing (11) includes a cover (111) and a base (112) for assembly with the cover (111); The enclosure (111) is used to house the signal processing module (13), control module (14), communication module (15) and battery module (16); The top wall of the cover (111) is provided with a receiving groove (1111), and the sensor assembly (12) is embedded in the receiving groove (1111); The base (112) is mechanically connected to the fixing component (2).

3. The durability monitoring device for marine steel pipe piles according to claim 2, characterized in that, The communication module (15) includes a wired communication module (61) electrically connected to the signal processing module (13) for sending the monitoring data to the data acquisition terminal; The cover (111) has a through hole on its side wall, and a waterproof connector (17) is provided on the through hole. The wired communication module (61) is electrically connected to the data acquisition terminal through a cable passing through the waterproof connector (17).

4. The durability monitoring device for marine steel pipe piles according to claim 3, characterized in that, The communication module (15) further includes a wireless communication module (62) electrically connected to the signal processing module (13) for sending the monitoring data to the mobile terminal.

5. The durability monitoring device for marine steel pipe piles according to claim 2, characterized in that, The fixing component (2) includes a clamp (21) and a fixing frame (22) disposed on the clamp (21), and the base (112) is screwed onto the fixing frame (22).

6. The durability monitoring device for marine steel pipe piles according to claim 1, characterized in that, The sensor assembly (12) includes a second housing (121), and the outer side wall of the second housing (121) is provided with a plurality of first accommodating positions (311) for assembling the CL concentration sensor, pH sensor or resistivity sensor and for making the sensor contact with the outside.

7. The durability monitoring device for marine steel pipe piles according to claim 6, characterized in that, The corrosion sensor includes a corrosion probe and a raw probe. The outer wall of the second housing (121) is also provided with a second accommodating position (312) for assembling the corrosion probe and making the corrosion probe contact the outside world and a third accommodating position (313) for assembling the raw probe. The third accommodating position (313) is also provided with an isolation member for isolating the raw probe from the outside world.

8. The durability monitoring device for marine steel pipe piles according to any one of claims 1 to 7, characterized in that, The signal processing module (13) includes a resistivity signal processing unit (41) electrically connected to the resistivity sensor and control module (14), a corrosion signal processing unit (42) electrically connected to the corrosion sensor and control module (14), and an electrode signal processing unit (43) electrically connected to the CL concentration sensor, pH sensor and control module (14).

9. The durability monitoring device for marine steel pipe piles according to claim 8, characterized in that, The resistivity signal processing unit (41) includes a voltage processing unit (411) and a current processing unit (412); The voltage processing unit (411) includes a first instrumentation amplifier U306, a first resistor R315, a second resistor R321, a fourth resistor R318, and a first capacitor C321; the negative input terminal of the first instrumentation amplifier U306 is electrically connected to the negative terminal of the resistivity sensor and is electrically connected to digital ground via the first resistor R315; the positive input terminal of the first instrumentation amplifier U306 is electrically connected to the positive terminal of the resistivity sensor and is electrically connected to digital ground via the second resistor R321; the output terminal of the first instrumentation amplifier U306 is electrically connected to digital ground via the fourth resistor R318 and the first capacitor C321; the connection node of the fourth resistor R318 and the first capacitor C321 is electrically connected to the control module (14); The current processing unit (412) includes a second instrumentation amplifier U307, a fifth resistor R324, a sixth resistor R326, an eighth resistor R325, and a second capacitor C326. The negative input terminal of the second instrumentation amplifier U307 is electrically connected to digital ground via the fifth resistor R324. The positive input terminal of the second instrumentation amplifier U307 is electrically connected to the negative terminal of the resistivity sensor and is also electrically connected to digital ground via the sixth resistor R326. The output terminal of the second instrumentation amplifier U307 is electrically connected to digital ground via the eighth resistor R325 and the second capacitor C326. The connection node between the eighth resistor R325 and the second capacitor C326 is electrically connected to the control module (14).

10. The durability monitoring device for marine steel pipe piles according to claim 8, characterized in that, The corrosion signal processing unit (42) includes a third instrumentation amplifier U105, a ninth resistor R119, a tenth resistor R122, an eleventh resistor R120, a thirteenth resistor R121, a third capacitor C129, a fourth capacitor C130, a fifth capacitor C132, and a sixth capacitor C131. The negative input terminal of the third instrumentation amplifier U105 is connected to the negative terminal of the corrosion sensor via the ninth resistor R119 and to digital ground via the third capacitor C129. The positive input terminal of the third instrumentation amplifier U105 is connected to the positive terminal of the corrosion sensor via the tenth resistor R122 and to digital ground via the fifth capacitor C132. The negative and positive input terminals of the third instrumentation amplifier U105 are also connected to the fourth capacitor C130. The eleventh resistor R120 is connected to the negative and positive terminals of the corrosion sensor. The output terminal of the third instrumentation amplifier U105 is connected to digital ground via the thirteenth resistor R121 and the sixth capacitor C131. The connection node of the thirteenth resistor R121 and the sixth capacitor C131 is electrically connected to the control module (14).

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